Scale method is not tested in the college entrance examination of liberal arts mathematics in senior three. According to the outline of the college entrance examination, scaling and mathematical induction were not taken in the liberal arts college entrance examination in senior three, and they were not taken many years ago, but they were taken in the science college entrance examination in senior three.

Scaling means making inequality

Scaling method is a thinking method that guides the direction of deformation through inequality proof.

Common skills of scaling method

Discard (or add) some items, enlarge or reduce the numerator or denominator in the fraction, apply basic inequalities (such as mean inequality) to scale, apply monotonicity of functions to scale, and scale according to the subject conditions.